Escapement.



S. OZAPAS. ESGAPEMENT. APPLICATION FILED JAN. 2, 1913.

Wines sea,

1720621707: Siaru'slaw 61259326.

Patented Dec. 9, 1913.

UNITED STATES PATENT ornron.

s'ranisnaw CZAPAS, or BBOCKTON, MASSACHUSETTS.

ESCAPEMENT.

Specification of Letters Yatent.

1,080,896. PatentedDec. 9, 1913.

Application filed January 2, 1913. Serial No. 739,653.

To all whom it may concern:

Be it known that I, STANISLAW CZAPAS, a subject of Nicholas II, Czar of Russia, residing at Brockton, county of Plymouth, Commonwealth of Massachusetts, have invented certain new and useful Improvements in Escapements, of which the following is a specification.

This invention relates to clock escapements, and particularly to the escapement anchor of a endulum operated clock. n clocks of this class, as at present constructed, the escapement wheel is actuated by an anchor rockingly mounted and connected by an escapement arm with the pendulum. The construction and arrangement of the anchor, relative to the escapement wheel, is such that in its engagement with the escapement wh there is a noticeable tendency on t e part of the anchor to push back on the escapement wheel, thus varying its rotation and impairing the efliciency of the clock as a time keeper.

The present invention was devised to overcome this objection, and to this end I employ a novel form 0 anchor, the leading end of which is so shaped as to travel past each escap the pendulum rod at one end and connected at 1ts other end to the shank 8 of my improved anchor. Said anchor is rockingly mounted on a pivot pin 4: and is adapted for engagement with the teeth 5 of the escapement wheel 6 mounted on an arbor 7 journaled in the clock plate. The shank 8 of the anchor is formed at its forward end with a downwardly turned leading tooth 9 struck from a radius from the pivot pin t and concentric therewith, so that said leading tooth in its engagement with the escapement tooth will ride down along the inner ace of the tooth in such a manner as not to reverse or in any way vary the intermittent revolution of said escapement wheel.

The shank 8 is formed at its other end with a substantially straight tail 1O disposed at an obtuse angle to said shank so that a circle having the outer curve 0 the leading tooth as a portion of its circumference will pass through said tail at its point of juncture with the shank. This tail, furthermore, is set in such a manner as to lie substantially parallel to the leading end of the anchor.

In operation each tooth comes in contact first with the curved end 9 of the anchor indicated in Figs. 2 and 3. Upon the return of the pendulum the end 9 of the anchor is gradually withdrawn, as indicated in Fig. 3, from the tooth until it finally releases the tooth, which then moves past the end of the anchor until the escapement is stopped by a contact of the tooth next in frontof it with the tail 10 of the anchor. Upon the recovery of the pendulum, the tail 10 is raise again permitting the partial rotation of the ement tooth without pushing it back, and the tail of which is so shaped that when the leading end leaves the escapement tooth said tail will be flat against the tooth which lies next to it.

The construction and principle of my invention will be more fully disclosed in the specification which follows, and in the drawings which form a part thereof, I have shown an illustrative embodiment which I have found well adapted to practical use.

Throughout specification and drawings wheel during which partial rotation another similar characters of reference will denote tooth 5 moves up to contact with the curved corresponding parts, and in these drawings: end 9 of the anchor 8. The operation of the Figure 1 1s a face view of a sufficient portion of a clock escapement to illustrate the appliof the steps shown in Fig. 8, that is to say, cation and principle of my invention. Fig. beginning at the figure on the right, the 2 is an exaggerated diagrammatic view of a tooth 5 reaches the line of swing o the portion of the escapement wheel and the curved end 9 just as that curved end moves anchor, illustrating in dotted lines the movedown. The result is an initial contact shown device at this point is simply the reversing ment of the anchor relative to the teeth of in the second figure toward the left and the said wheel. Fig. 3 is a diagrammatic view motion is continued in the third and fourth illustrating the successive positions of the figures to the left.

leading end of the anchor in passing a tooth Inasmuch as the curved end of the anchor of the escapement wheel.

I have indicated at 1 a portion of a clock late of the usual type, at 2 the pendulum weight supported rom the usual pendulum rod, at 3 the escapement rod bent aroun things being equal, the clock will keep better time than those constructed under existing conditions. This is due to the fact that the curve on the outside of the anchor bend is struck from other tooth of the escapenient wheel, thus securing an even, progressive drive of the escapenient wheel.

arious modifications in the and operation of my construction device may be resorted tooth in addition to its function of avoiding to when found necessary if within the limits the backward push has the additional ad of the appended claim. vantage of relievin the snock due to the hat I, therefore, claim and desire to secure by Letters Patent is 1 There is in the usual escapement construc- The combination of a toothed escapcment tion a tendency to rebound which is in addiwheel and a pivoted anchor, one end of said tion to the backward push of the ordinary anchor and one side of said tooth of said anchor. The movement of the curved end 9 wheel being curved on a circle with the pivot of the anchor as; a center and the other end of the anchor being on the same curve as is said curved side of the tooth, and inte-rlitting the same in one position of the anchor.

In testimony whereof I affix my signature in presence of two witnesses.

STANISLAlV CZAPAS.

contact with the correas itswings into face of the tooth avoids spondingly curved the jarring contact least of the tendency to recoil.

WVhen the leading end of the anchor leaves the escapement tooth the tail will be in a position to intercept the projecting tooth which is moving toward it, as illustrated in dotted lines in Fig. 2. This position enables the leading end of the anchor to take up an I lVitnesses Nonnnn'r KOERNER, VICTORIA LOWDEN.

Commissioner of Patents.

Gopiesof this patent may be obtained for five cents each, by addressing the Washington, D. 6. 

